[PATCH] powerpc/pseries/iommu: Add check for iommu_pseries_alloc_group()
From: Haoxiang Li <hidden>
Date: 2026-06-22 16:39:10
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
Add check for the return value of iommu_pseries_alloc_group() to prevent a potential null pointer dereference. Signed-off-by: Haoxiang Li <redacted> --- arch/powerpc/platforms/pseries/iommu.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index 3e1f915fe4f6..3b49a0f76df9 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c@@ -1875,6 +1875,9 @@ static void pci_dma_dev_setup_pSeriesLP(struct pci_dev *dev) pci = PCI_DN(pdn); if (!pci->table_group) { pci->table_group = iommu_pseries_alloc_group(pci->phb->node); + if (!pci->table_group) + return; + tbl = pci->table_group->tables[0]; iommu_table_setparms_common(tbl, pci->phb->bus->number,
--
2.25.1